Hi i have a Massey 231 with a bum injection pump. i also have an old pump from an industrial massey 203. Any suggestions as to whether this swap will work? Brian
Don't know about those pumps but you can turn up or down a pump. I had a 255 Massey that I had turned up from 52 HP to 74 HP. Same pump just had to change injectors. So if it fits you might have to turn it up or down.